ActionBar：“向上”图标和“溢出”菜单图标未出现，但可以使用

Question

The ActionBar on my app, which is a toolbar, does not show the icons for the UP button, nor the overflow menu, just a white bar. However, these still work- if you touch where they are supposed to be . They simply are not appearing.

I've compared the theme, xml, and manifests to an older app of mine which did not share the same problems, and found no differences. So I am completely lost.

Styles xml

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="AppTheme_NoActionBar" parent= "AppTheme">
        <!-- Customize your theme here. -->

        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>

    </style>



    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

Activity_main.xml

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/coordinator"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.xu.servicequalityrater.CameraActivity">

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" >


        <TextView android:textSize="20dp" android:textColor="@color/black" android:layout_gravity="center_horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Veritas" />



    </android.support.v7.widget.Toolbar>



</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_main" />



</android.support.design.widget.CoordinatorLayout>

Manifest excerpt

 <activity
            android:name=".CameraActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@style/AppTheme_NoActionBar" />

Any advice by members who have faced similar issues is extremely welcome!

Answer 1

As you are using Theme.AppCompat.Light.DarkActionBar , your toolbar back icon and overflow icon showing as white color and I guess you have used colorPrimary as white .

Change colorPrimary to other color OR you can use Theme.AppCompat.Light , it will show back and overflow icon as black .

Here is the fully working code

Style.xml:

<resources>

    <style name="AppTheme" parent="Theme.AppCompat.Light">
        <item name="colorPrimary">@color/colorPrimary</item> <!-- WHITE -->
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>    
    </style>

    <style name="AppTheme.NoActionBar" >
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

</resources>

AndroidManifest.xml:

<activity android:name=".MainActivity"
    android:theme="@style/AppTheme.NoActionBar">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />
</LinearLayout>

MainActivity.java:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }
}

OUTPUT:

Hope this will help~